Except for the little detail about the NSA not being allowed to spy Americans indirectly either.
The problem is not that they find creative ways to bend the law, it's that they didn't really need to. It's been proven over and over again that even in the cases where they did break the law without any loophole or excuse, nothing happened anyway.
The problem is reality itself. The reality that since the beginning of times governing people requires spying that same people. We've gotten much more civilized in that now we make an effort of keeping that people in ignorance, so they are a bit happier; but the spying continues.
The government needs spies as it needs assassins and torturers and all kinds of evil agents. If the people keep pushing to reveal the truth, the result won't be the disappearance of evil agents but the removal of the pink veil.
At some point, if the kid insists enough, the parent's patience ends and he replies "because I say so, now shut up."